package com.ricky.base.config;


import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * @Author Ricky
 * @Date 2024/6/20 14:08
 * @Description: 配置并返回一个线程池任务执行器（ThreadPoolTaskExecutor），用于异步执行任务
 */
@Configuration
@EnableAsync(proxyTargetClass = true)
@Slf4j
public class ExecutorConfig{

    private int corePoolSize = 5;

    private int maxPoolSize = 50;

    private int queueCapacity = 300;

    private String namePrefix = "sys-async-";

    @Bean(name = "asyncExecutor")
    public Executor asyncExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        //配置核心线程数
        executor.setCorePoolSize(corePoolSize);
        //配置最大线程数
        executor.setMaxPoolSize(maxPoolSize);
        //配置队列大小
        executor.setQueueCapacity(queueCapacity);
        //配置线程池中的线程的名称前缀
        executor.setThreadNamePrefix(namePrefix);
        // rejection-policy：当pool已经达到max size的时候，如何处理新任务
        // CALLER_RUNS：不在新线程中执行任务，而是有调用者所在的线程来执行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        //执行初始化
        executor.initialize();
        log.info("线程池初始化完成-----------------");
        return executor;
    }
}
